<template>
	<view class="goods-list">
        <view v-for="(goods, i) in goodsList" :key="i" @click="gotoDetail(goods)">
            <!-- 为 my-goods 组件动态绑定 goods 属性的值 -->
            <my-goods :goods="goods"></my-goods>
        </view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				queryObj: {
                    query: '',
                    cid: '',
                    pagenum: 1,
                    pagesize: 10
                },
                goodsList: [],
                total: 0,
                defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
                // 是否正在请求数据
                isloading: false
			};
		},
        onLoad(options) {
            this.queryObj.query = options.query || ''
            this.queryObj.cid = options.cid || ''
            this.getGoodsList()
        },
        methods:{
            async getGoodsList(cb){
                this.isloading = true
                const {data : res} = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
                this.isloading = false
                // 如果调用者给了 关闭下拉效果的的函数则执行这个函数
                cb && cb()// cb函数如果存在，立刻执行
                
                if(res.meta.status !== 200){
                    return uni.$showMsg()
                }
                // this.goodsList = res.message.goods
                // 使用扩展运算符，将新查出来的数据合并到 goodsList上
                this.goodsList = [...this.goodsList, ...res.message.goods]
                this.total = res.message.total
            },
            gotoDetail(goods){
                uni.navigateTo({
                    url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods.goods_id
                })
            }
        },
        // 上拉触底事件
        onReachBottom() {
            // 判断是否还有下一页数据
            if (this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕！')
            
            // 判断是否正在发起请求
            if(this.isloading) return
            
            this.queryObj.pagenum += 1
            this.getGoodsList()
        },
        // 下拉刷新事件
        onPullDownRefresh() {
            this.queryObj.pagenum = 1
            this.total = 0
            this.isloading = false
            this.goodsList = []
            // 重新请求数据并关闭下拉效果
            this.getGoodsList(() => uni.stopPullDownRefresh())
        }
    
	}
</script>

<style lang="scss">
    
.goods-item {
  display: flex;
  padding: 10px 5px;
  border-bottom: 1px solid #f0f0f0;

  .goods-item-left {
    margin-right: 5px;

    .goods-pic {
      width: 100px;
      height: 100px;
      display: block;
    }
  }

  .goods-item-right {
    display: flex;
    flex-direction: column;
    justify-content: space-between;

    .goods-name {
      font-size: 13px;
    }

    .goods-price {
      font-size: 16px;
      color: #c00000;
    }
  }
}

</style>
